Hi Snow,

 

This problem was caused by PCB producing process.

 

Hi, Justin,

More question for clearly understand the nonconforming.

What’s the process caused the solder ball?

Is it come from PCB producing process?

Or is it come from PCBA SMT process / wave process?

 

 

Hi All,

 

We have found some solder balls inside TH on the PCB (See below photo), however there is no exact matching of the defect mentioned in IPC, but according to IPC-A-610 Clause 5.2.7.1, the solder ball is accepted if it is embedded in the solder resist. So, would you please share your experience in such case with me?

 [log in to unmask]">

Thanks in advance!

 

Best regards,

Justin Wu

Utilux South China Ltd

Phone: +86-755-2850 7521

Fax:    +86-755-2850 0927

E-mail Address: [log in to unmask]

 

 

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